CN101917919B - Device for stabilizing the spinal column - Google Patents
Device for stabilizing the spinal column Download PDFInfo
- Publication number
- CN101917919B CN101917919B CN200980000422.6A CN200980000422A CN101917919B CN 101917919 B CN101917919 B CN 101917919B CN 200980000422 A CN200980000422 A CN 200980000422A CN 101917919 B CN101917919 B CN 101917919B
- Authority
- CN
- China
- Prior art keywords
- rod
- adapter
- bone screw
- accommodation section
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000087 stabilizing effect Effects 0.000 title abstract 2
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 42
- 230000004308 accommodation Effects 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000001052 transient effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000002301 combined effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 230000000472 traumatic effect Effects 0.000 description 1
Abstract
The invention relates to a device for stabilizing the spinal column, with a bone screw (1), which has a screw shank (2) and a first threaded portion (5), for introduction into the bone, with a rod (3) and with a connector (4), which can be fastened to the bone screw (1) and is intended for releasably connecting the rod (3) to the bone screw (1). The connector (4) has a connector body (9) with a through-opening (10) and a rod receptacle (11), which is open on one side and into which the rod (3) can be clipped by using a spring action.
Description
Technical field
The present invention relates to a kind of device for spinal fixation, this device has the bone screw with shank of screw, this bone screw has the first thread segment for inserting bone, and this device also has rod and has and can be fixed on adapter above bone screw, for described rod is releasably connected with bone screw.
Background technology
Disease for the traumatic or rotten property of spinal column often produces this requirement, in order to regenerate or ensure the supporting role of spinal column, by means of apparatus spinal fixation.For example can be set forth in the rod-screw system shown in EP 1 254 639A1 for a kind of such apparatus, it has bone screw, and it can insert in vertebral body as the fixed support of adapter with eye, and rod can penetrate by this eye.Rod is for being combined into stable unit by multiple vertebral bodys, and rod must be through the eye of the bone screw of multiple application for this reason.Because first bone screw is fixed in vertebral body, rod penetrates by the eye of adapter afterwards and requires larger working place.
Summary of the invention
Therefore task of the present invention is, constructs so a kind of device for spinal fixation that starts described type, simplifies perioperative operation.
This task solves according to the present invention thus for the device of the described type of beginning, and adapter has connector body and the one-sided unlimited excellent accommodation section with through hole, and rod can snap in this rod accommodation section in the situation that utilizing elastic reaction.
This structure of the adapter of rod-screw system has advantages of larger, rod needn't be one by one by penetrating along moving of its longitudinal axis in the single eye of adapter of application, but in the motion of radially carrying out towards excellent longitudinal axis, realize the location of rod in bone screw by means of adapter in side.
If it is favourable consisting of two body protuberances opposite one another in this excellent accommodation section, these body protuberances form the deck of the peripheral shape of matching pillar, wherein can realize the elastic reaction that the present invention wishes in simple mode by this structure, measure is for example body protuberance pretension in opposite directions.
If there is respectively at least one lath at this for the body protuberance that forms deck, under framework of the present invention, be particularly preferred, wherein this lath limits the lateral opening width of excellent accommodation section, and in the time that rod snaps in, first force excellent accommodation section to broaden by means of the deflection of body protuberance thus, body protuberance is because the elastic reaction of hope encloses securely after rod inserts.
In order to simplify excellent insertion in deck, under framework of the present invention, specify in addition, body protuberance is configured on two body arms that are apart connected to each other in body base.Realize this advantage by this structure, can think that connector body provides the larger material thickness with corresponding high load capacity, can not damage the deflection characteristic of body protuberance, because the deflection characteristic of body protuberance and body arm can be utilized cumulatively.
If hole configuration becomes the slotted hole in connector body, there is adapter and the rod probability that bone screw improvement is adjusted relatively.Preferred at this so, slotted hole is configured in body arm and has the sidewall of the vertical axis extension that favours adapter, and then this sidewall is adjusted when angle as the backstop for bone screw in restriction.
If connector structure becomes the Connection Element for connecting positor, is very particularly preferred under framework of the present invention.Under the framework of spinal operation, often produce this requirement, not only vertebral body need to be fixed as the part of spinal column, but also must make vertebral body align relative to each other, to copy the organization of human body bending of hope or the bending of correction side of spinal column.Using connector structure as the Connection Element for connecting positor, this advantage is provided, can utilize the bone screw being positioned in vertebral body, to produce the alignment of vertebral body by positor by adapter, wherein due to rod-screw system, the alignment realizing like this can be fixed enduringly, like this by utilize adapter at intra-operative as the Connection Element to positor and as the repeatedly availability in the part of the rod-screw system for stationary device, a kind of system very simply with less member is provided.
In the case of considering that the corresponding rotatory of not damaging connector body for connecting the structure of positor is suitable by being configured in slotted hole adapter in the connector body longitudinal axis rotatability around it.This can realize, measure be adapter on connector body, have circumferentially extend for the coefficient annular groove of positor.
If bone screw is adjacent to described the first thread segment to have bar shoulder be favourable in addition, because can utilize this bar shoulder to determine on the axial dimension of bone screw allocation really for adapter, needn't make adapter oneself directly be supported on vertebral body.
Under framework of the present invention, specify in addition, on shank of screw, construct the second thread segment, and for for the device of spinal fixation set up for the coefficient fixed mechanism of the second thread segment, because the combined effect of hold-down nut and the second thread segment, can realize the position of the relative bone screw of adapter and fix, and rod compresses in excellent accommodation section.Also be provided with pad, an one side is matched with the peripheral shape of connector body, and another side is used for abutting in hold-down nut, contributes to like this transmission of improvement power.
If shank of screw has the line of rabbet joint that at least one is divided into shank of screw bar section in the region of the second thread segment in addition, in framework of the present invention, prove favourable, because there is this probability in simple mode like this, the corresponding demand of the second thread segment that is bone screw is shortened, to avoid as far as possible bone screw to exceed the region of hold-down nut.Alternatively or also can addedly there is this probability, in the region of the second thread segment, construct at least one specified fracture location.
If do not rely on by hold-down nut and be applied to the power on connector body, also produced temporary transient fix of rod in excellent accommodation section, under framework of the present invention, wish, the surface of this lining bar accommodation section and/or rod has the structure and/or the coating that improve fixation aptly.This for example can by longitudinally, laterally or the decorative pattern intersecting form corresponding structure, they make the surperficial interlock reclining mutually or form at least one form fit to connect by the surface pressing that improves or corresponding rib or projection.
The present invention relates to a kind of combination of the device for spinal fixation in addition, it is made up of bone screw, rod and the adapter with positor, wherein connector structure becomes the Connection Element for connecting positor, measure is that adapter has the annular groove extending circumferentially on connector body, for the one-sided unlimited groove combined effect of positor.
Brief description of the drawings
Next the present invention describes in detail by the embodiment illustrating in the drawings, shown in figure:
Fig. 1 is the perspective view according to device of the present invention,
Fig. 2 is the side view of the device of Fig. 1,
Fig. 3 is the front view of the device of Fig. 1,
Fig. 4 is the side view of removing the later rod-screw system of positor,
Fig. 5 shows the cross section V-V of Fig. 4,
Fig. 6 be rod-bolt-system of Fig. 4 with the front view of the adapter rotating relative to bolt longitudinal axis,
Fig. 7 is with the relative bolt longitudinal axis schematic diagram at the adapter of another direction rotation corresponding with Fig. 6,
Fig. 8 is the perspective view of independent bone screw,
Fig. 9 is the perspective view of independent adapter,
Figure 10 is the perspective view of independent pad, and
Figure 11 is the perspective view of independent hold-down nut.
Detailed description of the invention
Show in the drawings the device for spinal fixation, it comprises rod-bolt-system, and this system is made up of single-piece, rod 3 and the adapter 4 of the bone screw 1 with shank of screw 2.
Fig. 8 shows bone screw 1 individually at this, and it has the first thread segment 5 for inserting bone.Adjacent with the first thread segment 5 is bar shoulder 6, and is configured with the second thread segment 7 on the end on the opposite that is positioned at the first thread segment 5 of the shank of screw 2 of bone screw 1.In shank of screw, be extended with passage 8 for intubation (Fig. 5).
Under the framework of the operation for spinal fixation, specify, utilize the first thread segment 5 to insert in the vertebral body of spinal column multiple this bone screw 1.Then can on the bar shoulder 6 of bone screw 1, place adapter 4, it has connector body 9 and one-sided unlimited excellent accommodation section 11 with through hole 10, and rod 3 can snap in this accommodation section in the situation that utilizing elastic reaction.Corresponding adapter illustrates individually in Fig. 9, can find out, connector body 9 has body base 12 and two body arms 13 that are connected to each other in body base apart, body arm has respectively body protuberance 14 on its free end, body protuberance 14 is connected to the lath 16 above body protuberance 14 in the case of applying respectively at least one, forms the deck 15 of the peripheral shape of matching pillar 3.
Fig. 9 also illustrates, through hole 10 in connector body 9 is configured to slotted hole, and it has the sidewall of the vertical axis extension that favours adapter 4, thereby has produced this probability, by sidewall as backstop as restriction, adapter 4 rotates on shank of screw 2 around its longitudinal axis.Corresponding adjustment possibility explanation in Fig. 6 and 7 of adapter 4 relative bone screw 1.After on shank of screw 2 at adapter 4 in bone screw 1, correspondingly location and the relative bone screw of adapter 41 are alignd, rod 3 can be snapped in excellent accommodation section 11, the structure of the rod-bolt-system wherein realizing like this can, by means of the hold-down nut 17 (Figure 11) being tightened on the second thread segment 7 of bone screw 1, be fixed if desired by pad 18 (Figure 10) in the situation that.Pad 18 has a side that is matched with adapter 4 and one for abutting in the second side on hold-down nut 17.Under the line of rabbet joint that utilizes specified fracture location or construct in the region of the second thread segment 7, can shorten shank of screw 2.
But also produce this probability by device according to the present invention, before locating in the excellent accommodation section 11 at adapter 4 at rod 3, first utilize rod 3 to realize the correct directed and location of vertebral body in spinal column, adapter 4 is configured for the Connection Element by connect positor 20 in the annular groove 21 circumferentially extending in the region of body base 12 on connector body 9 for this reason.Positor 20 can utilize the groove 22 of attaching troops to a unit in it to advance in this annular groove 21, and this groove produces the position change of vertebral body for the application of the corresponding lever force by bone screw 1.Complete after reset, the orientation of vertebral body and the bone screw 1 realizing like this can by if desired suitably the rod 3 of bending be fixed, so then positor 20 can take off from the adapter 4 as Connection Element.
Reference numerals list
1. bone screw
2. shank of screw
3. rod
4. adapter
5. the first thread segment
6. bar shoulder
7. the second thread segment
8. passage
9. connector body
10. through hole
11. rod accommodation sections
12. body base
13. body arms
14. body protuberances
15. decks
16. laths
17. hold-down nuts
18. pads
19. lines of rabbet joint
20. positors
21. annular grooves
22. grooves
Claims (1)
1. for the device of spinal fixation, it comprises
-thering is the bone screw (1) of shank of screw (2), this bone screw has the first thread segment (5) for inserting bone,
-rod (3),
-can be fixed in bone screw (1), for releasably connecting the adapter (4) of described rod (3) and bone screw (1),
Wherein, described adapter (4) has the excellent accommodation section (11) of connector body (9) and the one-sided opening of band through hole (10), wherein, described through hole (10) is configured to the slotted hole in connector body (9), and described excellent accommodation section (11) by two opposite one another, the body flange (14) respectively in order to form draw-in groove seat (15) with at least one lath (16) forms, it is characterized in that, described lath (16) limits the lateral opening width of excellent accommodation section (11), thereby in the time that snapping in excellent accommodation section (11) in the situation that utilizing elastic reaction, described rod (3) first by means of the deflection of body flange (14), excellent accommodation section (11) is broadened, and described body flange (14) is because the elastic reaction of hope is closed and form the draw-in groove seat of the peripheral shape of matching pillar (3) securely after insertion by described rod (3), thereby do not rely on the power being applied on connector body by hold-down nut and produced temporary transient fix of rod in excellent accommodation section yet, wherein, described adapter (4) is configured for connecting the Connection Element of positor (20), wherein, described adapter (4) on connector body (9), have circumferentially extend for the coefficient annular groove of positor (20) (21).
2. device according to claim 1, is characterized in that, described body flange (14) is configured in two with mutual distance join on the body arm (13) in body base (12).
3. device according to claim 1, is characterized in that, described slotted hole is configured in body arm (13) and has the sidewall of the vertical axis extension that favours adapter (4).
4. device according to claim 1 and 2, is characterized in that, described bone screw (1) is adjacent to described the first thread segment (5) and has bar shoulder (6).
5. device according to claim 1 and 2, is characterized in that, is configured with the second thread segment (7) on described shank of screw (2).
6. device according to claim 5, is characterized in that, is provided with and the coefficient hold-down nut of the second thread segment (7) (17).
7. device according to claim 6, is characterized in that, is provided with pad (18), and a side of this pad is matched with the peripheral shape of connector body (9), and another side of this pad is used for abutting in hold-down nut (17).
8. device according to claim 1 and 2, is characterized in that, the surface of described excellent accommodation section (11) and/or rod (3) has the structure and/or the coating that improve fixation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE2009/075005 WO2010094250A1 (en) | 2009-02-19 | 2009-02-19 | Device for stabilizing the spinal column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101917919A CN101917919A (en) | 2010-12-15 |
| CN101917919B true CN101917919B (en) | 2014-10-22 |
Family
ID=43088026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980000422.6A Expired - Fee Related CN101917919B (en) | 2009-02-19 | 2009-02-19 | Device for stabilizing the spinal column |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101917919B (en) |
| MX (1) | MX2009013313A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123706A (en) * | 1997-12-17 | 2000-09-26 | Lange; Robert | Apparatus for stabilizing certain vertebrae of the spine |
| WO2004082522A2 (en) * | 2003-01-31 | 2004-09-30 | Murray Ian P | Multi-axial positioning system for a surgically-implanted spinal support |
| CN101052357A (en) * | 2004-08-10 | 2007-10-10 | 华沙整形外科股份有限公司 | Reducing instrument for spinal surgery |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810817A (en) * | 1992-06-19 | 1998-09-22 | Roussouly; Pierre | Spinal therapy apparatus |
| US6123707A (en) * | 1999-01-13 | 2000-09-26 | Spinal Concepts, Inc. | Reduction instrument |
| US7090674B2 (en) * | 2003-11-03 | 2006-08-15 | Spinal, Llc | Bone fixation system with low profile fastener |
-
2009
- 2009-02-19 MX MX2009013313A patent/MX2009013313A/en active IP Right Grant
- 2009-02-19 CN CN200980000422.6A patent/CN101917919B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123706A (en) * | 1997-12-17 | 2000-09-26 | Lange; Robert | Apparatus for stabilizing certain vertebrae of the spine |
| WO2004082522A2 (en) * | 2003-01-31 | 2004-09-30 | Murray Ian P | Multi-axial positioning system for a surgically-implanted spinal support |
| CN101052357A (en) * | 2004-08-10 | 2007-10-10 | 华沙整形外科股份有限公司 | Reducing instrument for spinal surgery |
Also Published As
| Publication number | Publication date |
|---|---|
| MX2009013313A (en) | 2010-09-27 |
| CN101917919A (en) | 2010-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150219 |
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| EXPY | Termination of patent right or utility model |